North American fish species are diverse and can be found in various habitats, including rivers, lakes, and oceans. Common freshwater fish include bass, trout, and catfish, while popular saltwater species include tuna, cod, and flounder. These fish play essential roles in their ecosystems and are important for recreational and commercial fishing. Many North American fish are adapted to their environments, exhibiting unique behaviors and physical traits. For example, salmon are known for their remarkable migration patterns, traveling upstream to spawn. Conservation efforts are crucial to protect these species and their habitats from overfishing and pollution.